COAL vs Magazine Depth

[davsco]

so i have a 10-round Accurate mag on order that doesn't have the binder plate and they say it is 2.950 cartridge depth. what is the longest you'd load rounds with that to ensure they don't bind?

 

[spife7980]

2.940 but Id check lands and make sure you wont be jamming the bullets at those lengths.

 

[r.tenorio671]

so i have a 10-round Accurate mag on order that doesn't have the binder plate and they say it is 2.950 cartridge depth. what is the longest you'd load rounds with that to ensure they don't bind?

....bullet choice needs to be considered as some bullets are longer than others although the weights are the same and the type of ogive is also a factor. Measurements of the COAL (cartridge base to bullet tip) is determined by your magazines "depth", but the measurement of the CBTO (cartridge base to bullet ogive) will determine bullet seating depth for amount of "jam" desired, which can affect magazine fit.

 

[acourvil]

A .010 space works for me. But the magazines are not super consistent, some are longer and some are shorter than the 2.950. And sometimes it is shorter deeper in the mag than right at the top where you can measure it easily. I’ve had mags that run fine with maybe 4 or 5 rounds, but if you push them below that, they drag or bind. If you are going to use them in a match, make sure you check them fully loaded first.